光电三极管 meaning in English

photo triode
photoelectric triode
phototriode

In the counting system , a semiconductor laser emitter is used as the light source , point laser beam produced by optic system , reflection of part transferred into electric signal by photoelectric triode , and scm system as the counter
采用半导体激光发射器作为光源，经过光学系统形成的最小激光束照射器件，反射光由光电三极管进行光电转换，计数控制使用单片机系统。